Okay, I'm not really mad, but Monsters of Sin #7: Wrath certainly has got my gander up, but in a good way! This supplement is all about being angry, and barbarians are going to have to move over, because now everybody can rage like them with the wrathful creature template! (Don't worry, barbarians will still be way better at it.) Of course, you'll get plenty more from Kobold Press (previously known as Open Design) in this supplement, including the hulking whelp, savager, spiteful spirit, and the big guns: the countryside-crushing Embodiment of Wrath!
If you miss the skill synergies from 3.5, Misfit Studios has updated and clarified those mechanics for use in your Pathfinder Roleplaying Game with Superior Synergy: Fantasy! This book is full of how to make your skills play nicely with each other, like using your woodworking craftsmanship to make it easier to build a wooden structure. But it's not just about skills—feat synergies are also included in this book! Have the Acrobatic and Animal Affinity feats? You'll gain the Rolling Rider feat synergy effect, allowing you to take less damage when falling from your mount. If you fancy yourself a swashbuckler, then the Swinging Attack synergy effect will allow you to bull rush, attack, or trip an opponent when swinging from an object.